SAP Patches CVSS 9.9 NetWeaver ABAP Flaw That Could Expose or Modify Data

Summary

SAP has released security updates for July 2026, addressing a critical CVSS 9.9 vulnerability (CVE-2026-44747) in SAP NetWeaver Application Server ABAP that could lead to data exposure, modification, or system unavailability. The company also patched two other critical flaws: CVE-2026-27690, an HTTP request/response smuggling flaw in SAP Approuter, and CVE-2026-44761, a use of default credentials flaw in SAP Commerce Cloud related to sample OAuth 2.0 configurations.

Full text

SAP Patches CVSS 9.9 NetWeaver ABAP Flaw That Could Expose or Modify Data Ravie LakshmananJul 14, 2026Enterprise Security / Vulnerability SAP has rolled out updates to address multiple vulnerabilities as part of its July 2026 security updates, including a critical flaw in SAP NetWeaver Application Server ABAP. The vulnerability in question is CVE-2026-44747 (CVSS score: 9.9), an out-of-bounds write flaw that allows an authenticated attacker to leverage logical errors in memory management to cause a memory corruption that could lead to unauthorized data access, modification, or system unavailability. "As a temporary workaround the note proposes to disable all ICF nodes with a specific property in transaction SICF," SAP security firm Onapsis said. "Since the workaround will disable opening transactions in SAP GUI for HTML, it is not an option for all customers and it is strongly recommended to install the patching ABAP Kernel version." Also addressed by SAP are two other critical vulnerabilities - CVE-2026-27690 (CVSS score: 9.1) - An HTTP request/response smuggling flaw in SAP Approuter deployments in non-Cloud Foundry environments that allows an unauthenticated attacker to send a specially crafted HTTP request that leads to request-response desynchronization and results in the exposure of user responses and triggers denial-of-service (DoS) attacks. CVE-2026-44761 (CVSS score: 9.1) - A use of default credentials flaw in SAP Commerce Cloud that could retain a sample OAuth 2.0 client with publicly documented sample credentials originating from a sample configuration provided in SAP Help Portal documentation. "If left unchanged, an unauthenticated attacker could use these well-known credentials to obtain a valid access token and invoke certain APIs to read and modify data," according to a description of CVE-2026-44761 in the NIST National Vulnerability Database (NVD). "Successful exploitation results in high impact on confidentiality and integrity, with no impact on availability." Onapsis noted that the vulnerability stems from sample configuration scripts previously provided in the SAP Help Portal. These scripts, originally meant for development and testing, configure OAuth 2.0 clients with hard-coded, well-known credentials. "Older versions of the documentation did not explicitly warn customers against importing these default settings into production," it noted. "An unauthenticated attacker can leverage these publicly available, default credentials to obtain a valid access token. With this token, they can invoke specific APIs to read and alter system data. Exploitation requires that the customer executed the sample script and retained the resulting OAuth 2.0 client in production without replacing the hard-coded secret." It's worth noting that customers who removed the sample client or replaced the secret with a strong, unique value are not impacted by the bug. Customers are recommended to audit their production environments for the presence of the affected sample OAuth 2.0 client. If the client exists, it must be removed. Although there is no evidence of the flaws being exploited in the wild, it's advised to apply the necessary updates for optimal protection. Found this article interesting? Follow us on Google News, Twitter and LinkedIn to read more exclusive content we post. SHARE     Tweet Share Share Share SHARE  API Security, Application Security, Authentication Security, Cloud security, data security, denial of service, enterprise security, SAP, Vulnerability, Web Security ⚡ Top Stories This Week 16-Year-Old Linux KVM Flaw Lets Guest VMs Escape to Host on Intel and AMD x86 Systems BeyondTrust Patches Critical Auth Bypass Flaws in Remote Support and PRA Court Filing Reveals Windows Device ID Helped FBI Trace Alleged Scattered Spider Hacker Rogue Agent Flaw Could Have Let Attackers Hijack Google Dialogflow CX Chatbots RedWing MaaS Packages Android Bank Fraud as a Telegram Rental Service 15-Year-Old GhostLock Flaw Enables Root and Container Escape on Most Linux Distros GitHub Copilot Refuses Harmful Requests in Chat, Then Writes Them in Code New HalluSquatting Attack Could Trick AI Coding Assistants Into Installing Botnet Malware GhostApproval Symlink Flaws Could Let Malicious Repos Run Code in AI Coding Agents Top AI Agents Built to Catch Malicious Code Can Be Tricked Into Running It Meta's New AI Image Tool Lets Others Use Your Public Instagram Photos in AI Images ThreatsDay: Cloud Bucket Hijacking, Windows LPE Chain, Global Fraud Bust + 17 More Stories Dormant GitHub Accounts Help Attackers Blend In While Mapping Corporate Orgs Attackers Exploit 'Ill Bloom' Vulnerability to Drain Over $5 Million From Cryptocurrency Wallets Unpatched XRING Flaw in XQUIC Lets Remote Clients Crash HTTP/3 Servers Researcher Details WhatsApp-to-Host Attack Chain Using Three OpenClaw Flaws New TrojPix Attack Leaks Data From Air-Gapped Systems via Video Cable Emissions Unpatched Flaws Disclosed in Filesystem Bundled Into Millions of Embedded Devices New "Bad Epoll" Linux Kernel Flaw Lets Unprivileged Users Gain Root, Hits Android Google Disrupts NetNut Residential Proxy Network Spanning 2 Million Home Devices European Parliament Member Investigating Spyware Was Hacked With Pegasus ⭐ Featured Resources What 200+ Security Teams Reveal About Using IP Intelligence in 2026 Get Hands-On SANS Training for Today’s Cyber Defense and Offensive Security Challenges See What’s Really Exposed Across Your IT, OT, IoT, Cloud, and Mobile Assets Get Gartner’s Guide to AI Agent Supervision and Runtime Controls

Indicators of Compromise

• cve — CVE-2026-44747
• cve — CVE-2026-27690
• cve — CVE-2026-44761

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